function s1_goto_dir(){
cd $1}

function s2_touch_empty_file_with_given_name(){

touch $1.file
}
function s3_make_directorios(){
mkdir projects
cd projects
mkdir git
cd ../
mkdir backup
}
function s4_create_6_files(){
cd pwd
mkdir linux{1..2}_centos linux{1..2}_redhat linux{1..2}_c_programming
}
function s5_make_directories_in_git(){
cd git
mkdir linux{1..2}
}
function s6_move_files_to_dir_1_or_2(){
mv linux1_* /git/linux1
mv linux2_* /git/linux2
}
function s7_create_package_and_compress(){
tar -czvf backup/git.tar.gz git
}
function s8_delete_dir_git(){
rm git
}
function s9_recover_from_git_tar_gz_backup(){
tar -zxvf git.tar.gz -C /projects
}
function s10_create_package_and_compress(){
tar -jcvf backup/git.tar.bz2 git
}
function s11_find_and_sort_alphabetically_all_created_files_and_dirs(){
cd ../
find ./projects -name linux* | sort
}
function s12_get_next_15_minutes_boundary(){
data -d "1970-01-01" +%s` /60/15\*68\*15
}
